a = 30 - 3**2 + 8//3**2*10
print("第一题的答案为：", a)

b = 3*4**2/8 % 5
print("第二题的答案为：", b)

c = 2**2**3
print("第三题的答案为：", c)

d = (2.5+1.25j)*4j/2
print("第四题的答案为：", d)

